Complete all steps of the Design Recipe to solve both of the problems below. We’ve provided a start to the first problem as a model.
Define a function called few-legs, which consumes a Row of the animals table and computes whether it has fewer than 4 legs. HINT: use predefined rows like snail-row to make your examples easier!
Contract and Purpose Statement |
Every contract has three parts…
few-legs::Row->Boolean
_
Examples |
Write some examples, then circle and label what changes…
examples:
few-legs (snail-row) is snail-row["legs"] < 4
few-legs (cat-row) is cat-row["legs"] < 4
end
Definition |
Write the definition, giving variable names to all your input values…
fun ________(_):
_____________
end
Define a function called many-legs, which consumes a Row of the animals table and computes whether it has more than 4 legs. HINT: use predefined rows like dog-row to make your examples easier!
Contract and Purpose Statement |
Every contract has three parts…
_________::___->_______
_
Examples |
Write some examples, then circle and label what changes…
examples:
_________ (_________) is _____________________
_________ (_______) is ___________________
end
Definition |
Write the definition, giving variable names to all your input values…
fun _________(_):
_____________
end
These materials were developed partly through support of the National Science Foundation, (awards 1042210, 1535276, 1648684, 1738598, 2031479, and 1501927). 
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